Inductors

Compact flyback transformers

TDK-EPC, a group company of the TDK Corporation, presents a new series of compact SMD flyback transformers from EPCOS for space-saving power supplies. Thanks to their EFD cores, they enable insertion heights of only 8.65 to 14.8 mm, depending on the transformer type.

The new B82802* series comprises three core sizes and covers the power range between 12 and 55 W. These SMD flyback transformers are suited for input voltages of between 36 and 60 V at a clock frequency of 100 kHz and a duty ratio of up to 50 percent. In the standard versions, the output power is divided up among two or three windings. This results in voltages of 3.3 V at currents of 1.2 to 3.3 A; 5 V at 0.8 to 5.5 A and 12 V at 0.5 to 2.3 A. Customer-specific configurations of the output voltages and powers are also possible. The transformers are designed for an operating temperature of between -40 and +125 °C and tested for breakdown at 1500 V AC.

Glossary

Flyback converter: a special switching converter topology. These DC/DC converters are also known as buck-boost converters. Their advantage lies in the electrical separation between input and output voltage. Flyback converters are used at powers of up to 250 watts.

Main applications

DC/DC converters for industrial and consumer electronics as well as communications technology.